KR101415513B1 - A orbital type pipe cutting/beveling machine for the cutting tool can be freely controlled in rotation plate - Google Patents

Abstract

Disclosed is an orbital type pipe cutting machine, which can accurately control a cutting tool to approach or withdraw by making an external force, generated in a fixed body, one-to-one matched to the cutting tool mounted on a rotary body which is rotated at high speed, and enables cutting and chamfering, and machining various shapes of patterns with one cutting tool by allowing the cutting tool to move in an axial direction (X axis) of a pipe as well as a central direction (Y axis) thereof. According to the present invention, the orbital type pipe cutting machine includes: a rotary body which is coupled to one side of a main body to be rotated, and through which a pipe passes; a chuck which is arranged on both front and back sides of the main body or on one of the front and back sides to fix the pipe; at least one double-acting linked cylinder on which a rod is mounted on a rear surface of the rotary body to protrude to the main body; a push unit which is arranged on the main body to include at least one pusher protruding to the rotary body; a bearing which is coupled between the pusher and the rod to perform axial rotation, and transmission of weight to both sides in an axial direction; a double-acting hydraulic cylinder which is arranged in the front of the rotary body to be connected with the double-acting linked cylinder through a closed hydraulic circuit; and a cutting tool which is coupled to the rod of the hydraulic cylinder to reciprocate (Y axis) toward a central portion of the rotary body.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an orbital type pipe cutting apparatus capable of freely controlling the movement of a cutting tool in a rotating body,

[0001] The present invention relates to an orbital-type pipe cutting apparatus, and more particularly, to an orbital-type pipe cutting apparatus that transmits an external force without being affected by rotation within a rotating body rotating at high speed, And more particularly, to an orbital-type pipe cutting apparatus capable of controlling a pipe-type pipe.

Related to the cutting technique of piping, an orbital cutting device has been developed in which the pipe is gradually enlarged and heavily shaped, and the cutting tool is cut while gradually cutting the outer periphery of the fixed pipe to a certain depth. Such an orbital piping cutter can be cut and chamfered by simultaneously mounting a cutting tool and a chamfering tool.

1 and 2 (hereinafter, referred to as "prior art 1") have been disclosed as an example of the above-described orbital cutting / chamfering device. 1 and 2, the prior art 1 is provided with a main body 10 for fixing the pipe P while being positioned at the center, and a pipe (not shown) is provided on one side (front side) The cutting tool 31 and the chamfering tool 32 are opposed to each other in front of the rotating body 20 so that the rotating body 20 is opposed to the rotating body 20 So that the cutting tool 31 and the chamfering tool 32 can be vertically moved in a predetermined length (toward the center of the tube) every time the rotating body 20 makes one revolution. At this time, the cutting tool 31 and the chamfering tool 32 are mounted on the block 40 which is guided so as to reciprocate in the direction of the center of the pipe P from the front surface of the rotating body 20, Is again screwed to the rotary shaft 50, and a gear 51 is formed at the upper end of the rotary shaft 50. The rotary shaft 50 vertically moves the block 40 at a pitch corresponding to the rotation angle of the gear 51 so that the block 40 So that the cutting tool 31 and the chamfering tool 32 mounted on the centering member P enter the center of the pipe P. [

The above-described prior art 1 is a device capable of cutting or simultaneously chamfering a pipe while digging the cutting tool 31 and the chamfering tool 32 to a constant depth each time the pipe P rotates around the pipe P, It is a limited technique that can not arbitrarily control the movement of the tool / chamfer tool. That is, the above prior art can not arbitrarily adjust the cutting tool / chamfer tool when the rotating body 20 is in motion.

The fact that the cutting tool / chamfering tool can not be arbitrarily adjusted means that the cutting conditions can not be changed depending on the size, material, and type of the workpiece. This not only causes a reduction in cutting efficiency but also makes cutting itself impossible. Further, it is troublesome to perform the operation of turning the rotary body back to the original position or returning the rotary tool to the original position by using a separate reverse rotation means after the cutting operation is completed .

In addition, the cutting / chamfering device of the prior art 1 is hard to predict when the cutting tool / chamfering tool is dull or broken during the operation, and the cutting tool / chamfering tool is damaged or the workpiece is frequently burned. That is, when the tool is dulled or broken in the cutting / chamfering device as in the prior art 1, the tool is continuously moved to the workpiece side by the rotation of the gear, even though the workpiece is not cut due to an abnormal condition of the tool Pagoda repeats the action. Such a state is repeated so that the load between the tool and the workpiece is increased, and the load causes the entire tool pack or the workpiece to be damaged.

In addition, the cutting / chamfering device of the prior art 1 has a problem that various shapes can not be machined, a problem in which a thick steel pipe having a thickness greater than a certain thickness is not cut, a problem of breakage due to a collision between a gear and a latch, The problem that the chamfering blade must be replaced at any time according to the shape can not be solved.

To explain this problem in more detail, the prior art 1 processes the pipe material in the order of operations shown in FIG. That is, the cutting tool 31 and the chamfering tool 32 enter the tube P as they are seen in the first drawing of FIG. 3 and progressively enter the depth of the tube P and are processed in the order of No. 2 to No. 4, . Therefore, there is a limitation in machining the pipe by the prior art 1, which can be limited to the cutting process as shown in Fig. 4 (a) and the cutting and one-side chamfering as shown in Fig. 4 (b).

And, as shown in Fig. 5, it will be appreciated that the cutting tool 31 for cutting the tubing should be longer than the thickness t of the tubing to be cut. However, if the length L of the cutting tool is increased to cut the tubular member having the thickness t of several tens mm or more, the cutting tool will not withstand the force applied during cutting and will easily break.

6, the blade length l _b of the chamfering tool 32 to be improved on the cut surface of the tube should have a length larger than the inclined surface of the tube to be cut. However, as shown in Fig. 7, since the length (l _b ) of the chamfered blade portion is considerably longer than the length (? _C ) of the cutting blade portion, the force received by that blade portion must also withstand the corresponding load.

In the prior art 1, the load received when cutting and the load (i.e., the cutting force P) applied when chamfering are performed are different from each other in a manner that the cutting tool is cut to the center by a predetermined depth value per rotation . Here, the anti-cutting force P is determined by the non-cutting resistance Ks, the cutting width l and the machining depth dp depending on the material of the workpiece to be cut.

Therefore, as shown in FIG. 7 (b), when the cutting tip for cutting is used, it is possible to predict the cutting width (? _C ) and the working depth (dp) by ignoring the non-cutting resistance depending on the material of the workpiece, The cutting width l _b varies according to the thickness t of the tube, as shown in Fig. 7 (a), so that the proper pitch of chamfering (the depth to be processed per revolution) It is difficult to select a value. For these reasons, it has been difficult to commercialize it because it fails to satisfy various work requirements, and there are problems in frequent breakage of the chamfering tool or in designing a mechanism to overcome it.

In addition, the cutting tool and the chamfering tool are lowered and cut to a certain depth each time the gear is caught by the latch and rotated at a certain angle. If cutting and chamfering a pipe having a tube thickness of several tens mm or more is performed, There is a problem that the gears, the parts under the gears, and the brackets may be damaged. For example, assuming that the gear has five protrusions, the pitch is 1 mm when the gear rotates once, and when the tube thickness is 20 mm, each of the gears and the respective gears collide with each other five times In order to process 20mm, it is necessary to collide 100 times. If you do this 100 times a day, 10,000 collisions will occur, and if you work 100 days, 1,000,000 collisions will occur. Such a collision will cause a larger impact amount at the time of high-speed rotation and have a bad influence on the durability of the apparatus.

Since the cutting is performed only at a predetermined depth only when the gear of the prior art 1 is engaged with a gear, the width of the workpiece which can not arbitrarily adjust the cutting depth is narrowed. That is, the cutting speed, cutting depth, and the like are determined depending on the material of the workpiece or the type of the tool to be used. However, the prior art has a problem that it can not be controlled even if such a machining condition exists.

Further, although the chamfering angle may vary depending on the type and design of the tube, the prior art has a problem in that it is necessary to replace the chamfering tool necessarily in order to change the chamfering angle.

In order to solve such problems, it is desired to apply the hydraulic method which is less influenced by the centrifugal force of the rotating body.

As a related art of an orbital cutting device for controlling a cutting tool in a rotating body in a hydraulic manner, there has been proposed a method of cutting a cutting tool, There is a "pipe cutter".

Prior art 2 is a device for cutting a circular bar material by a relative rotation operation between a circular bar material P as a cutting material and cutting tools T1 and T2 as shown in FIG. This prior art 2 has a structure in which a cutting material feeding means (not shown) having a feeding member and a linking chuck for feeding a cutting material by a predetermined length and firmly fixing the feeding material and a cutting material feeding means Cutting means including cutting teeth and chamfered bits T1 and T2 which are rotated at a high speed by power transmission means for cutting the cutting material and cutting means including a main shaft driving pulley 74 and a main shaft 73, and a rotary plate 80, a limit switch 90 for controlling the operation function of the cutting means, and an operation control means including a plurality of hydraulic cylinder devices, So as to be relatively rotated and cut.

At this time, the operation control means includes a hydraulic oil inlet 72 formed on the frame 71 provided on the fixed table 70, and the hydraulic oil inlet 72 allows the pusher 75, which is formed in the hydraulic oil inlet 72, The pusher 75 pushes back the two horizontal push rods 81 formed in the rotary plate 80 by the pusher flange 76 integrally formed. The push rod 81 then actuates the two vertical pistons 83 formed in the rotary plate 80 and the operation of the vertical piston 83 causes the cutting and chamfering bosses T1, (p) in the vertical direction.

The limit switch 90 is connected to the pusher flange 76 to detect when the pusher flange 76 advances and when the pusher flange 76 advances backward.

This prior art 2 not only succeeds in getting external force into the rotating body, but it can also detect when the external force is applied, thereby realizing the overall automation of the apparatus.

However, prior art 2 has only used external force to enter and automate the cutting tools T1 and T2, but has not been used in the control to control the entry and retraction of the cutting tool. That is, the automation in the prior art 2 is limited only to the operation mode such as cutting / chamfering the circular bar material, and then the circular bar material enters the machining position again. There is a problem that precise control of the temperature can not be achieved.

In the specific structure of the prior art 2, the retraction of the cutting tool is returned by the spring 86, and the retraction of the pusher 75 is also returned by the spring 77. Therefore, the cutting tool can not retract due to the external force, and the retraction is determined by the repulsive force of the spring. Therefore, it is a form that is regarded as a simple return rather than a control.

In addition, since the vertical cylinder 83 and the push rod 81 for moving the cutting tool are single-acting type and the hydraulic oil is input / output, there is a problem that the cutting tool can not advance and retract quickly. That is, when the hydraulic pressure is released from the hydraulic fluid inlet 72 and the vertical cylinder 83 is lifted by the repulsive force of the spring 86, the hydraulic oil flows at one inlet and outlet, And retreat can not be done quickly.

The prior art 2 has a structure in which a non-rotating push flange 76 and a rotating push rod 81 are connected by a roller 82 so as to be connected to each other while rotating. By this roller 82 structure, the pushing force of the push flange 76 is transmitted to the push rod 81 side, but conversely, the pulling force of the push flange 76 is not transmitted to the push rod 81. That is, even if the push plunger 76 is retracted by depressurizing the hydraulic fluid injection port 72 to control the retraction of the cutting tool, the push flange 76 is separated from the roller 82, The push rod 81 is slowly retracted.

In order to precisely advance or retract the cutting tool and to control the cutting tool more than two axes so that the cutting surface of the circular bar is variously processed in accordance with the above-described structural form of the prior art 2, It is necessary to develop additional innovative technology.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a cutting tool capable of precisely controlling the advance and retreat of a pusher, The cutting tool can be moved in the axial direction as well as in the direction perpendicular to the circular material as the cutting material. Thus, the cutting tool can be cut and chamfered and patterned in various shapes as well as a tube having a thickness of several tens mm or more And to provide an orbital-type pipe cutting apparatus capable of cutting and chamfering the HEAVY PIPE at the same time.

In order to solve the above problems,

A rotor which is coupled to one side of the main body and through which the tubular member passes, a chuck which is installed on either or both of the front and the back of the main body, a chuck which is fixed to the rear side of the rotator, A pushing portion provided on the main body so as to have at least one pusher protruding toward the rotating body; a bearing coupled to the pusher and the rod so as to perform an axial rotation action and a force to transmit a load in both axial directions; A double-acting hydraulic cylinder provided in front of the rotating body so as to be connected to the interlocking cylinder by a hydraulic closed circuit, and a cutting tool coupled to the rod of the hydraulic cylinder and reciprocating (Y axis) toward the center of the rotating body The present invention provides an orbital-type pipe cutting apparatus capable of freely controlling the entry and retreat of a cutting tool.

At this time, the present invention can also be implemented in a form in which the tube is not passed through the body and the rotating body so as to process only the end portion of the tube.

The main body may further include a conveying means installed to be capable of reciprocating the main body in the axial direction (X-axis) of the pipe.

Alternatively, the chuck may further include chuck conveying means provided so that the chuck can reciprocate in the axial direction (X-axis) of the tube.

Here, the bearing is constituted by one inner ring, a pair of outer rings overlapping each other while covering the outer side of the inner ring, and a plurality of cylindrical rollers inserted between the inner and outer rings such that the axes intersect with each other, It is preferable that the pusher and the interlocking cylinder rod are coupled to both sides.

Alternatively, the cutting tool and the hydraulic cylinder connected thereto may be constituted of a plurality of valves, and a valve for operating any one of the hydraulic cylinders may be installed on a line connecting the hydraulic cylinders and the interlocking cylinders.

Alternatively, a plurality of cutting tools may be separately controlled by connecting the pushers, the interlocking cylinders, the hydraulic cylinders, and the cutting tools, each of which is composed of a plurality of bearings arranged upward and downward.

Alternatively,

A plurality of hydraulic cylinders mounted on the front side of the rotating body so as to be capable of reciprocating (Y axis) to fix the fixture, and a plurality of hydraulic cylinders mounted on the hydraulic cylinder The present invention relates to a hydraulic chucking device including a jaw that is mounted on a rear surface of a rotating body so as to protrude from a main body side and is connected to a hydraulic cylinder through a hydraulic circuit, A push portion provided on the main body so as to have at least one pusher and a bearing coupled between the pusher and the rod so as to perform an axial rotation action and a load transfer action in both axial directions You may.

The orbital-type pipe cutting apparatus according to the present invention has an advantage that the cutting tool can be precisely controlled by the external force to enter and retreat.

In the orbital-type pipe cutting apparatus according to the present invention, a cutting tool having at least one or more cutting tools can rotate about a pipe while simultaneously moving in a center direction (Y axis direction) and a longitudinal direction (X axis direction) Thus, there is an advantage that chamfering, cutting, and patterning of special shapes can be performed simultaneously with cutting and cutting of the pipe.

The orbital-type pipe cutting apparatus according to the present invention is characterized in that, in a process of cutting a HEAVY PIPE or a pipe having a thickness of several to several tens of mm, , "Double-improved" form or the like, so that if the cutting tool has a thickness within a range in which the cutting tool can be lowered, it is possible to perform high-speed cutting in various shapes by one tool.

The orbital-type pipe cutting apparatus according to the present invention uses a standardized cutting tool, so there is an economical advantage in terms of maintenance compared with the prior art that uses an expensive chamfering tool that has to cut a relatively wide surface at a time. Also, as in the conventional art, there is an advantage that the chamfering range can be freely set and processed without changing the chamfering tool according to the chamfering angle.

1 is a front view showing a pipe cutting and bevel machine according to the prior art 1,
2 is a side view of a pipe cutting and beveling machine according to prior art 1,
FIG. 3 is a view sequentially showing work processes for performing cutting and chamfering simultaneously in pipe cutting and beveling machines according to Prior Art 1. FIG.
FIG. 4 is a view showing an example of processing that can be performed in pipe cutting and beveling machines according to the prior art,
5 is a view showing the relationship between the cutting tool length and the pipe thickness in the pipe cutting and beveling machine according to the prior art 1,
6 is a view showing the relationship between the chamfering tool length and the pipe thickness in the pipe cutting and beveling machine according to the prior art 1,
FIG. 7 is a view showing the relationship of the force exerted by the chamfering tool shown in FIG. 6 during cutting,
8 is a view showing a pipe cutter according to the prior art 2,
FIG. 9 is a view showing a configuration of an orbital-type pipe cutting apparatus according to the present invention,
10 is a view showing another embodiment of the pipe cutting apparatus of the present invention,
11 is a flowchart showing a hydraulic line for operating a cutting tool according to the present invention,
FIG. 12 is a detailed view of the bearing shown in FIG. 11,
Figure 13 is a hydraulic line flow chart showing the action of the cutting tool entering,
14 is a hydraulic line flow chart showing the action of the cutting tool being retracted,
FIG. 15 is a view showing an example that can be machined using the orbital-type pipe cutting apparatus according to the present invention,
Fig. 16 is an exemplary view of a machining sequence for performing cutting and remedying operations simultaneously, which is the first example of the machining methods of Fig. 15,
17 is a view showing a plurality of cutting tools in the pipe cutting apparatus according to the present invention,
18 is an exemplary view for explaining the reason why a plurality of cutting tools are necessary,
19 is a hydraulic line flow chart when a plurality of cutting tools are used,
Figure 20 is an illustration of a hydraulic line in which a plurality of cutting tools are individually controlled, and
21 is a view showing another embodiment of an orbital-type pipe cutting apparatus capable of processing the end portion of the pipe exclusively.

Hereinafter, an orbital-type pipe cutting apparatus capable of freely controlling movement of a cutting tool in a rotating body according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

9, the cutting apparatus 100 according to the present invention includes a main body 110, a main body 110 which is rotated on one side of the main body 110, A pipe P which is coupled to the front surface of the rotating body 120 so as to reciprocate toward the center of the rotating body 120 and passes through the body 110 and the rotating body 120, And a cutting tool 130 that can be cut into a desired shape.

Here, the pipe P may be a long pipe or a bar as shown in the drawing, and the pipe or the bar may be round or square. In addition, the present invention is not limited to a straight line shape, but may be any object that can be positioned at the center of the axis of the main body 110, such as a bent shape such as an elbow.

The body 110 may be in the form of an "L" shape or an "L" shape, preferably a horizontally and vertically shrouded shape to provide the foundation for most configurations of the cutting device 100, You do not have to.

The main body 110 may be installed on a floor or a bed, and may have a function of allowing the main body 110 to reciprocate in the X-axis direction. That is, the X-axis direction refers to the longitudinal direction (axial direction) of the pipe P and can be used when the cutting tool 130 is moved to the cutting position of the pipe P in rapid feed. Alternatively, in addition to rapid traverse, precision can be transmitted for processing. Accordingly, the lower part of the main body 110 can be constructed to be capable of selectively moving in the X-axis direction by constructing the conveying means 190 such as the LM guide and the ball screw. Since the pipe P passes through the middle portion of the main body 110 while keeping the pipe P in a horizontal position, it is desirable that the perforation 112 needs to be horizontal and the outer shape of the main body 110 is also required to be vertical.

A chuck 200 for fixing the pipe P passing through the main body 110 without shaking is required for the main body 110 as described above. The chuck 200 may be formed on the outside of the main body 110 or on the outside of the main body 110 as shown in the drawing. The chuck 200 may be installed on only one side of the main body 110. The longer the pipe P is heavy, the more the two chucks 200 are required on the front and rear sides of the main body 110.

Alternatively, the chuck 200 may be integrally provided to support the main body 110, as shown in FIG. That is, after the chuck 200 is installed on both sides of the main body 110, a guide shaft 182 is horizontally disposed on the upper and lower sides of the chuck 200, It can be mounted. The main body 110 can be moved laterally by the guide shaft 182 and the transfer means 190 is installed on the lower side of the chuck 200 so as to be connected to the main body 110, Can be moved.

The rotating body 120 is rotatably coupled to one surface of the main body 110. The rotating body 120 has a shape in which the penetrating diameter 112 of the main body 110 protrudes, And is rotatably engaged with the bearing or the like. A driving unit 180 is provided to rotate the rotating body 120. The driving unit 180 and the rotating body 120 are coupled by a belt to rotate the rotating body 120 ) At an appropriate number of revolutions. That is, the rotating body 120 is rotatably coupled with the pipe P to be machined without being detached from the main body 110.

Since the rotating body 120 is rotated to process the tube, it is preferable that the rotating body 120 is a circular plate that is not eccentric for smooth rotation. On the outer circumferential surface of the rotating body 120, a pulley for receiving power from the driving unit 180 is formed. The driving unit 180 and the rotating body 120 according to the present invention may be driven by a belt coupling as shown in FIG. When the gears are coupled by gear engagement, the gears must be formed on the outer circumferential surface of the rotating body 120 having a large diameter. However, it is difficult to process the gears. However, It is expected to be easy to process.

The following describes a control structure in which the cutting tool 130 can enter or retract toward the pipe P side by an external force in the rotating body 120 rotating at high speed.

The cutting tool 130 according to the present invention is coupled to the rod of the hydraulic cylinder 140 mounted to be fixed to the rotating body 120 to selectively perform the entering and retreating operations. That is, the hydraulic cylinder 140 is mounted to be fixed to the rotating body 120, and the cutting tool 130 is attached to one end of the rod of the hydraulic cylinder 140. Or the cutting tool 130 may be connected via a guide such as a block rather than being directly connected to the rod to obtain a precise feed value.

Since the rotating body 120 of the cutting apparatus 100 according to the present invention is rotated at a high speed by the driving unit 180, there is a great difficulty in supplying and recovering the hydraulic pressure to the hydraulic cylinder 140. [ That is, the hydraulic pressure means that the fluid must be transferred through the closed tube at a high pressure. It is difficult for the high-pressure hydraulic line to pass through the rotating body 120 rotating at high speed. Therefore, in the present invention, a hydraulic closed circuit (HCC) is installed on the rotating body 120 rotating at a high speed and a push portion 160 is provided on the side of the main body 110 that is stopped, (160) pushes and pulls the hydraulic closing circuit. A space is formed between the main body 110 and the rotating body 120 so that the structure can be installed between the main body 110 and the rotating body 120 in order to construct the push portion 160 and the hydraulic pressure closing circuit. And the inner side of the main body 110 and the rotating body 120 facing each other are punched out to form a certain space.

FIG. 11 is a flowchart showing a hydraulic line for the cutting tool to be operated, and FIG. 12 is a detailed view of the bearing shown in FIG.

9 and 11, the hydraulic circuit HCC connects the hydraulic cylinder 140 and the interlocking cylinder 150 after mounting the interlocking cylinder 150 on the rear surface of the rotating body 120. [ The rod 152 of the hydraulic cylinder 140 is extended when the rod 152 of the interlocking cylinder 150 is contracted after the rod 152 protrudes toward the main body 110 And the rod 142 of the hydraulic cylinder 140 is contracted when the rod 152 of the interlocking cylinder 150 is extended. In order to keep the motions opposite to each other, the hydraulic pressure close circuit (HCC) will have to be set to have a hydraulic pressure so that the internal pressures on the side of the hydraulic cylinder 140 and the side of the interlocking cylinder 150 are constant. Further, a pressure gauge and charging port 153 for checking the current hydraulic pressure state in the hydraulic closing circuit (HCC) or for compensating the pressure when a sufficient hydraulic pressure is not set, and a device for sending out an abnormal condition may be provided .

More specifically, the hydraulic cylinder 140 is installed to move one cutting tool 130 in front of the rotating body 120, and is connected to the hydraulic cylinder 140 through an interlocking cylinder 150 are installed at least one. At this time, there is no problem in operating the hydraulic cylinder 140 even if only one interlocking cylinder 150 is installed. However, there is no problem in preventing the rotating body 120 from eccentrically rotating by one interlocking cylinder 150 So it is desirable to install a plurality of units at regular intervals. Alternatively, the hydraulic cylinder 140 may require a large capacity cylinder to give sufficient force to the cutting tool 130. However, the interlocking cylinder 150 may have a space constraint between the rotating body 120 and the body 110 It is preferable that a plurality of the interlocking cylinders 150 are connected to the single hydraulic cylinder 140. In this case, Therefore, the total volume of the plurality of interlocking cylinders 150 should be designed to correspond to the volume of one hydraulic cylinder 140.

In addition, the hydraulic cylinder 140 and the interlocking cylinder 150 use a double acting cylinder for rapid entry and retraction of the cutting tool 130. That is, although it is possible to use a single-acting cylinder only considering entry of the cutting tool as in Prior Art 1, in the present invention, which requires precise control of the entry distance, retraction distance, re-entry and re- Since a rapid advance and retreat of the tool 130 is a necessary condition, a double acting type cylinder designed to push and pull hydraulic oil in and out of each other is used.

The push portion 160 is provided on the front surface of the main body 110 facing the coupling cylinder 150 and has a pusher 162 to abut the end of the rod 152 of the coupling cylinder 150. Such a pusher 162 may be formed by a hydraulic cylinder rod, and the pusher 160 may be implemented by a hydraulic cylinder. Alternatively, the push portion 160 and the pusher 162 may be any of those capable of reciprocating linear motion such as a pneumatic cylinder, an electric cylinder, a linear motor, and a ball screw in addition to the hydraulic cylinder. Alternatively, since the push portion 160 is an original external force for controlling the movement of the cutting tool 130 in the rotating body 120, it may be equipped with various handles or levers for manual control as well as automatic control.

The push portion 160 has a pusher 162 to which a specific external force is pulled out and the end portion of the pusher 162 is configured to abut the rod 152 of the interlocking cylinder 150. At this time, since the rotating body 120 rotates at a high speed, the interlocking cylinder 150 and the rod 152 integrally coupled to the rotating body 120 are rotated together with the interlocking cylinder rod 152 A force is applied to the pusher 162 that abuts and a pushing force of the pusher 162 toward the interlocking cylinder 150 is applied but a pulling force is not applied as in the prior art 2.

Therefore, in the present invention, the bearing 170 is mounted between the interlocking cylinder rod 152 and the pusher 162 to restrain it. Such a bearing 170 is a bearing (or similar mechanical part) that allows both axes to rotate freely while allowing the load to be transferred to both axially.

The bearing 170 according to the present invention is configured to have a large ring shape and to surround the through hole 112 of the main body 110. At this time, it is preferable that a plurality of interlocking cylinders 150 and pushers 162 are provided. That is, at least one of the interlocking cylinders 150 and the pushers 162 may be arranged at equal intervals, since the bearings 170 are not tilted or pushed easily.

Next, the bearing 170 used in the present invention will be described.

The bearing 170 used in the present invention is designed so that rotational motion and axial load act simultaneously. 12, two rollers 172 and 173 for covering the outer periphery of the inner ring 171 and two rollers 172 and 173 inserted between the inner ring 171 and the outer rings 172 and 173, (174). At this time, the rollers 174 are inserted alternately so that their rotational axes intersect, and a V-groove for inserting the rollers 174 is formed on the surface between the inner ring 171 and the outer rings 172, 173. The pushing portion 160 is fixed to one of the outer rings 172 after the outer ring 172 and 173 of the bearing 170 are tightly coupled with the fastening bolt 175 and the inner ring 171 is interlocked And the cylinder 150 is fixed. The bearing 170 does not merely move horizontally by the pushing force of the pusher 162 but causes the inner ring 171 and the outer rings 172 and 173 to pass through a plurality of supports and guide bushes, So that the movement of the bearing can be transmitted horizontally and precisely.

In the cutting tool control structure described above, an interlocking cylinder 150 is mounted on the rotating body 120 so that an external force is transmitted to the rotating body 120, and the rod 152 of the interlocking cylinder 150 And a pusher 162 is mounted on the bearing 170 on the opposite side of the rod 152. In this case, The pusher 162 is operated by a push portion 160 which is an automatic or manual linear reciprocating means such as a cylinder such as a hydraulic, pneumatic or electric motor, or a linear motor, a ball screw, or a gear. Accordingly, the pushing force of the pusher 162 can be transmitted to the interlocking cylinder 150, which is rotated through the bearing 170 according to the pushing and pulling motion of the pusher 162.

The force transmitted to the interlocking cylinder 150 may be obtained by using the input / output (or flow rate, pressure) of the fluid generated as the rod 152 is expanded or contracted or by selecting the interlocking cylinder 150 as the double rod type, While the other rod may be used to output an input force while receiving an external force.

That is, when the interlocking cylinder 150 is expanded and contracted, the hydraulic pressure therein is input and output. The movement of the fluid is connected to the pipe cutting device 100 of the present invention and the hydraulic cylinder 140 by a hydraulic closing circuit (HCC) It can be utilized as an application for controlling a specific object by the force of hydraulic pressure. Alternatively, when the double-rod type interlocking cylinder 150 is stretched or shrunk, the opposite rod that moves in the opposite direction may be used as a means for moving a specific object in the rotating body 120. As an example of this, it is possible to provide a force necessary for rectilinear motion, such as an operation for turning the switch ON / OFF in the rotating body 120, a stopper, a pushing and pulling operation.

The following describes the operation of pushing or pulling the cutting tool 130 toward the pipe P side by using the push portion 160 and the hydraulic closing circuit (HCC).

Fig. 13 is a view showing the action of the cutting tool being introduced. As shown in this figure, when the hydraulic pressure is supplied from the pump to the pusher 162 so that the pusher 162 of the push portion 160 is extended according to the signal, The interlocking cylinder 150 is retracted by pushing (PUSH) the bearing 170 toward the rotating body 120 while the interlocking cylinder 162 is stretched. Although the pusher 162 is simply applied as a hydraulic cylinder, as described above, the pusher 162 can be any automatic or manual means for performing a linear motion in addition to the hydraulic cylinder.

In this way, when the interlocking cylinder 150 is contracted, the hydraulic cylinder 140 connected to the interlocking cylinder 150 is contrarily stretched, and the cutting tool 130 enters the pipe P side. This action is such that the external force inputted to push through the bearing 170 acts on only the movement of the fluid while maintaining the hydraulic pressure in the pure hydraulic circuit HCC consisting of the interlocking cylinder 150 and the hydraulic cylinder 140 in equilibrium will be. The bearing 170 serves as a bridge between the hydraulic circuit HCC and the pusher 162 so that the influence of rotation on the other side (pusher) (PUSH) load can be transmitted as it is, even if one of them rotates.

As shown in this figure, when the hydraulic pressure is supplied from the pump so that the pusher 162 is retracted according to the signal, the pusher 162 is retracted and the bearing 170 is retracted Pulled from the main body 110 side, and the interlocking cylinder 150 is stretched by this pulling action.

The rod 142 of the hydraulic cylinder 140 pulls the cutting tool 130 so that the cutting tool 130 contacts the pipe P side . At this time as well, the hydraulic pressure in the pure hydraulic circuit (HCC) composed of the interlocking cylinder 150 and the hydraulic cylinder 140, which is inputted to pull through the bearing 170, . The bearing 170 serves as a bridge capable of connecting the hydraulic circuit HCC and the pusher 162 to each other so that the axes of the bearings 170 can be freely rotated to transmit axial loads.

9, the orbital-type pipe cutting apparatus 100 according to the present invention is provided with a conveying unit 190 which can be moved in the X-axis direction at a lower portion of the main body 110 so that the cutting tool 130 is substantially 2-axis (X-axis, Y-axis) motion can be performed. That is, the cutting tool 130 coupled to the rotating body 120 moves in the Y-axis direction while entering and retreating in the rotating body 120. The body 110, to which the rotating body 120 is coupled, The cutting tool 130 performs two-axis motion in the X-axis direction and the Y-axis direction relative to the pipe P that is stopped.

Since the pipe P needs to be fixed by other restraining means than the main body 110 for the biaxial motion, the chuck 200 is installed on the front and rear sides of the main body 110 or on either side. A chuck conveying means 210 such as the conveying means 190 of the main body 110 may be installed below the chuck 200 to automatically transfer the tube P fixed to the chuck 200 .

The reason why the orbital-type pipe cutting apparatus 100 according to the present invention can be biaxially machined is to process the cross section of the pipe P into various forms. This is because the cross-section of the pipe member P is required to process the welding groove defined in the specification according to the material and thickness of the pipe member.

That is, in the HEAVY PIPE related industry, as shown in [Table 1], it is required that the improvement work for the groove welding should be "V" shape, "U" shape, "double improvement". That is, the "I" -shaped welding groove is a welding method mainly used at a tube thickness of 3 mm or less because stable welding can be performed without any improvement work. However, if the thickness of the tube starts to increase gradually, it is possible to use a "V" -shaped weld groove up to 20 mm, but it must have a "U" shape or a "double improvement" shape.

[Exemplary cross-sectional shape of the welding groove according to the thickness of the pipe] Welding groove type Weld groove cross-sectional shape Applicable pipe thickness Type I

t <3 mm V type

t = 6 to 19 mm U type

t> 20mm Double improvement

t> 40mm

The requirements for such an improvement are not realized in the cutting device of the prior art and in other cutting / chamfering devices, and all of them are carried out by hand with a grinder.

However, in the orbital-type pipe cutting apparatus 100 according to the present invention, welding grooving necessary for such groove welding can be performed in any shape, thereby realizing factory automation.

Fig. 15 is a view showing an example that can be machined using the orbital-type pipe cutting apparatus according to the present invention. As shown in the drawing of the first machining example in Fig. 15, ("V" welding groove machining). As shown in the drawing of the second machining example, it is possible to improve the rounding shape simultaneously with cutting ("U" welding groove machining). Further, as shown in the third working example, it is possible to process the "double-improved" welding groove, and as shown in the fourth working example, it is also possible to process a certain pattern of rounded shape continuously.

As an example of a machining method for the orbital-type pipe cutting apparatus 100 according to the present invention, a machining method capable of cutting and obliquely improving machining as in the first example of Fig.

As shown in FIG. 16, the cutting tool 130 is placed on the portion to be processed of the pipe P. In order to position the cutting tool in the machining portion of the pipe, a method of setting the machining position by operating the feed means 190 of the main body 110 and a method of setting the machining position by moving the chuck 210 are selected and used .

After the machining position is set as described above, the cutting tool 130 is moved in the Y axis direction so that the cutting tool 130 enters the surface of the pipe while rotating the rotating body 120. At this time, the appropriate depth should be considered considering the cutting conditions according to the type and thickness of the tube.

Next, the main body 110 is transported in the X-axis direction while the Y-axis movement is stopped. In this case, the moving distance in the X-axis direction can be easily obtained by previously calculating the thickness t of the tube and the angle of improvement (°). Such Y-axis direction machining and X-axis direction machining can be repeated several times to several tens of times to complete desired cutting and chamfering work.

As shown in FIG. 16, the cutting apparatus 100 according to the present invention is a method in which when cutting is performed simultaneously with the cutting operation, the cutting tool 100 enters the inside gradually tapering from the wide outer surface. Therefore, The length of the cutting tool need not be provided. That is, in the cutting apparatus 100 of the present invention, the moving distance of the cutting tool 130 in the Y-axis direction is a factor for determining the thickness of the tube. In addition, since the cutting device 100 according to the present invention can rotate the rotating body 120 at a high speed, the machining operation can be completed in a short time even if the order of machining is complicated.

FIG. 17 is a view showing a state where two cutting tools are mounted on the orbital-type pipe cutting apparatus according to the present invention, FIG. 18 is an exemplary view for explaining a case where a plurality of cutting tools are required, and FIG. And a hydraulic line structure for controlling the cutting tool.

The orbital-type pipe cutting apparatus 100 according to the present invention is not limited to a single cutting tool 130 coupled to the rotating body 120, but may be provided in plurality as shown in FIG. The reason why the plurality of cutting tools 130 are provided is that each cutting tool 130 performs a cutting operation and the other one performs a chamfering operation, As well. For example, as shown in FIG. 18, the cutting tool 130 for biaxial machining in the X and Y axes tends to be unsuitable for use for vertical cutting. Accordingly, it is possible to perform the finishing work by replacing the tool 130 'for vertical cutting. In this case, two hydraulic cylinders 140 are installed in the rotating body 120 for continuous machining, So that other cutting tools 130 and 130 'can be mounted.

19, in order to control the plurality of cutting tools 130 and 130 ', three-way valves V1 and V2 are provided on the lines connected to the two hydraulic cylinders 140 in the interlocking cylinder 150 And the specific cutting tools 130 and 130 'can be selectively operated according to the operation of the valves V1 and V2. Here, the cutting tool 130 and the hydraulic cylinder 140 may be constituted by two or more, and it may be possible to change the valves V1 and V2 for selectively opening and closing the hydraulic cylinders 140, respectively. At this time, the valves V1 and V2 are present in the rotating body 120. However, the valves V1 and V2 are operated by a simple operation such as pushing a protruding lever or the like from the outside of the main body 110 toward the rotating body 120, So that the mode conversion can be easily performed.

Although the above-described plurality of cutting tools 130 illustrate an embodiment in which only one cutting tool is selectively operated by the valves V1 and V2, a plurality of cutting tools may be separately controlled at the same time. That is, as shown in FIG. 20, the pusher 162, the bearing 170, the interlocking cylinder 150, the hydraulic cylinder 140, and the cutting tool 130 are constructed so as to cooperate, A pusher, a bearing, an interlocking cylinder, a hydraulic cylinder, and a cutting tool. In this case, the space for installing the pusher and the various cylinders is sufficient on the main body side and the rotating body side, but the operation of the bearing 170 is limited. Accordingly, the bearing 170 may be formed in an upward, downward, double or multiple manner so that the inner first end is connected to the pusher and the interlocking cylinder of the first group, and the second outer end is connected to the pusher and the interlocking cylinder of the second group, The cutting tool may also be controlled individually. Alternatively, a valve may be mounted on each hydraulic line of each set so that two of the four cutting tools are operated as a set.

The orbital-type pipe cutting apparatus 100 according to the present invention may be capable of simultaneously controlling not only one of the plurality of cutting tools 130 but also the function of alternately controlling the operation.

21 is a view showing another embodiment of an orbital-type pipe cutting apparatus according to the present invention. As shown in this figure, the main body 110 and the rotating body 120 are also formed so that their central portions are not penetrated. It can be possible. That is, since the intermediate portion of the pipe is not necessarily cut or chamfered in machining the pipe, it can be also implemented as a dedicated device for machining the end portion of the pipe. This is because when the pipe is shipped from the factory, its end is not delivered at the desired chamfer angle, it may be necessary to chamfer the end before the pipe cutting / chamfering. Or a method for machining the end of a short tube. The end of the pipe referred to here is not only the end of the pipe but also the end adjacent to the end. Therefore, it is possible not only to chamfer the end of the pipe, but also to finish the end ring and to cut the end portion of the pipe.

The control unit (not shown) for controlling the rotating body 120, the cutting tool 130, and the like in the orbital-type pipe cutting apparatus 100 of the present invention has not been described, Operation of valves V1 and V2 for selection of cutting tools 130 and 130'and cutting operation of cutting tools 130 and 130. The operation of PUSH and PULL of pusher 160 for pushing and pulling of cutting tool 130, There is provided a control unit for controlling various sensors such as the movement of the cutting device 100, such as the operation of the transfer means 190 for transferring the X axis of the tool 130 and the movement of the chuck 200 and the chuck transfer means 210 .

The orbital-type pipe cutting apparatus 100 according to the present invention can be utilized as a hydraulic chucking apparatus, though not shown in the drawing, in addition to pipe cutting / chamfering. That is, the chucking apparatus is a rotating body similar to the pipe cutting apparatus 100, and is a device composed of at least two jaws for gripping a fixture in the rotating body.

Therefore, instead of a plurality of cutting tools 130, a chuck jaw is mounted on the orbital-type pipe cutting apparatus 100, and a hydraulic close circuit (HCC) and a pusher 162 are installed from the outside so that these jaws can be opened or closed with each other, It will be possible to do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. .

100: cutting apparatus of the present invention 110:
112: through hole 120: rotating body
130: cutting tool 140: hydraulic cylinder
150: interlocking cylinder 160: pushing part
170: Bearing 180:
190: transfer means 200: chuck
210: chuck conveying means V1, V2: valve
P: Tube HCC: Hydraulic Closed Circuit

Claims (8)

A rotating body 120 coupled to one side of the main body 110 and rotated while passing through the tube P;
A chuck 200 installed on the front and / or the back of the main body 110 to fix the pipe P;
At least one double acting interlocking cylinder 150 mounted on a rear surface of the rotating body 120 such that a rod 152 protrudes toward the main body 110;
A push portion 160 installed on the main body 110 side to have at least one pusher 162 protruding toward the rotating body 120;
A bearing (170) coupled between the pusher (162) and the rod (152) so as to perform an axial rotation action and a load transfer action in both axial directions;
A double acting hydraulic cylinder 140 installed in front of the rotary body 120 to be connected to the interlocking cylinder 150 by a hydraulic pressure closing circuit (HCC); And
And a cutting tool (130) coupled to the rod (142) of the hydraulic cylinder (140) and reciprocating (Y axis) toward the center of the rotating body (120) Orbital-type pipe cutting device capable of freely controlling the operation of the pipe.
A rotating body 120 coupled to one side of the main body 110 and rotated;
At least one double acting interlocking cylinder 150 mounted on a rear surface of the rotating body 120 such that a rod 152 protrudes toward the main body 110;
A push portion 160 installed on the main body 110 side to have at least one pusher 162 protruding toward the rotating body 120;
A bearing (170) coupled between the pusher (162) and the rod (152) so as to perform an axial rotation action and a load transfer action in both axial directions;
A double acting hydraulic cylinder 140 installed in front of the rotary body 120 to be connected to the interlocking cylinder 150 by a hydraulic pressure closing circuit (HCC);
A cutting tool 130 coupled to the rod 142 of the hydraulic cylinder 140 and reciprocating (Y axis) toward the center of the rotary body 120; And
And a chuck 200 installed at a front side of the main body 110 to fix the pipe P so that an end of the pipe P is positioned within a machining range of the cutting tool 130. [ Orbital type pipe cutting device capable of freely controlling the entering and retreating of the pipe.
3. The method according to claim 1 or 2,
The main body 110 further includes feed means 190 installed to be capable of reciprocating the main body 110 in the axial direction of the pipe P (X axis). An orbital pipe cutting device that can be controlled.
3. The method according to claim 1 or 2,
And a chuck transfer means (210) installed to the chuck (200) so as to reciprocate the chuck (200) in the axial direction (X axis) of the pipe (P). An orbital pipe cutting device that can be freely controlled.
3. The method according to claim 1 or 2,
The bearing 170 is composed of a single inner ring 171 and a pair of outer rings 172 and 173 which are overlapped with each other and wrap the outer side of the inner ring 171 and the inner ring and the outer ring, Wherein the pusher (162) and the interlocking cylinder rod (152) are coupled to both the inner ring and the outer ring at a corresponding one of the plurality of cylindrical rollers (174). Pipe cutting device.
3. The method according to claim 1 or 2,
The cutting tool 130 and the hydraulic cylinder 140 connected to the cutting tool 130 are constituted by a plurality of hydraulic cylinders 140 and one of a plurality of hydraulic cylinders 150 on a line to which the hydraulic cylinders 140 and the interlocking cylinders 150 are connected Wherein a valve (V1, V2) is provided for actuating the cutting tool. The orbital-type pipe cutting device is capable of freely controlling the entry and retreat of the cutting tool.
3. The method according to claim 1 or 2,
A plurality of cutting tools 130 (130) are formed by connecting the pusher (162), the interlocking cylinder (150), the hydraulic cylinder (140) and the cutting tool ) Of the cutting tool (1) is controlled individually.
A rotary body 120 which is coupled to one side of the main body 110 and through which a fixture to be chucked is inserted; a rotary body 120 mounted on the front side of the rotary body 120 such that it can reciprocate (Y axis) A hydraulic chucking device comprising a plurality of hydraulic cylinders (140) and a jaw mounted on the hydraulic cylinder (140)
A rod 152 mounted on the rear surface of the rotating body 120 so as to protrude toward the main body 110 and connected to the hydraulic cylinder 140 through a hydraulic closing circuit HCC, A push portion 160 installed on the main body 110 side so as to have at least one pusher 162 protruding toward the rotating body 120 and a pivot portion 160 disposed between the pusher 162 and the rod 152, And a bearing (170) coupled to perform an action of transferring a load to both the working and axial directions.

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